Python using Redis to calculate latitude and longitude distance case

1. Required libraries, redis

pip install redis

2. Connecting to Redis

import redis
class RedisCtrl(object):
    @staticmethod
    def connect(config):
        pool = (
            host=config['host'],
            db=config['db'],
            port=config['port'],
            password=config['password'],
        )
        return (connection_pool=pool)

rd = ({
    "db": 1,
    "port": "6379",
    "password": "password",
    "host": "",
})

3. Calculations

Import the known address latitude and longitude into Redis for the calculation of the

(name="Collection name", values=["Longitude.", "Dimension.", "Name of address"])

Add multiple locations at oncevalues=[longitude1, dimension1, address name1, longitude2, dimension2, address name2, longitude3, latitude3, address name3......]。

4. View latitude and longitude of added locations

result = ("Collection name", "Address name 1", "Address name 2")
print(result)  # [(address1longitudes, address1dimensionality), (address2longitudes, address2dimensionality)]

If not found, it returnsNone。

result = ("Collection name", "Error name 1", "Error name 2")
print(result)  # [None, None]

5. Calculation of the distance between the two places

("Collection name", "Address name 1", "Address name 2", unit="km")

unit: unit of distance, optional("m": meter, "km": kilometer, "mi": mile, "ft": foot), the default value ism。

6. Addresses within the scope of the search

result = (name="Collection name", longitude="Longitude.", latitude="Dimension.", radius="Radius distance", unit="Radius unit",
                     sort='ASC', count=10, withdist=True, withcoord=True)
print(result)    # [[b'Address name', gap, (longitudes, dimension (math.))], [b'shanghai', 0.1774, (121.4813420176506, 31.235159732038248)]]

• sort: Sort by.ASCFrom near to far.DESCFrom far to near.
• count: Specifies the previous data to be returned.
• withdist: Whether to return the distance.
• withcoord: Whether to return latitude and longitude information.

Attention:The returned data where the address name isbytetype, the use of which requires thedecode('utf-8)Processing.

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